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Flash-Based Live-Cell Fluorescent Imaging of Synthetic Peptides Expressed in Arabidopsis and Tobacco
Not Available
Examination of uncertainties in historical UO 2 data using the flash gap technique
Historical shock compression data on porous uranium dioxide, UO 2 , reported by Goplen [Goplen, LA-04319-MS, 1970] is examined within the context of contemporary measurement and analysis techniques for the assignment of uncertainties. It is suggested that all data for initial density ρ 00 = 10.3 g/cm 3 with pressures below 93.1 GPa be omitted from further analysis due to the possibility that a strong elastic component to the shock wave polluted the Hugoniot measurement. Furthermore, extensive uncertainty bounds on the two lowest initial density samples, ρ 00 = 3.1 and 4.3 g/cm 3 , preclude meaningful interpretation of the data and should also be omitted from further analysis.
Preliminary Analysis of Texas Instrument Hercules Flash-based Microcontroller
Abstract not provided.
(Toward) Density Reconstruction from Proton Flash Radiographs Using the Bayes Inference Engine [Slides]
Abstract Not Provided
Preliminary Analysis of Texas Instrument Hercules Flash-based Microcontroller [Slides]
Abstract not provided.
3D, Flash, Induced Current Readout for Silicon Sensors
A new method for silicon microstrip and pixel detector readout using (1) 65 nm-technology current amplifers which can, for the first time with silicon microstrop and pixel detectors, have response times far shorter than the charge collection time (2) 3D trench electrodes large enough to subtend a reasonable solid angle at most track locations and so have adequate sensitivity over a substantial volume of pixel, (3) induced signals in addition to, or in place of, collected charge
Damaged Surface Hydrodynamics (DSH) Flash Report
In an effort to understand the complex hydrodynamic flow present when a non-ideal (or damaged) surface between a dense, solid-state metal impinges on a light, gas in converging geometry, two DSH experiments have been conducted at the LANL LANSCE pRad facility utilizing magnetic drive from the Precision High Energy-density Liner Implosion eXperiment (PHELIX) pulsed power capacitor bank. Here a tungsten power coated target aluminum cylinder was filled with inert gas (Ar/Xe). An outer aluminum cylinder is magnetically accelerated and impacts the target shock launching the powder into the gas and compressing the cylinder until such time as the increase in gas pressure causes stagnation. Each experiment is imaged with a 21-frame proton radiography movie where gas shocks, powder distribution, and target cylinder are clearly visible. These two experiments complement the DSH-0 experiment from FY14 where the target cylinder was evacuated as a control case.
Crenulation-1 Flash Report
We briefly report on the first of PHELIX driven Crenulation experiments diagnosed with proton radiography. PHELIX is a 300 kJ capacitor bank located at the LANL LANSCE pRad facility. It is capable of delivering a 4 MA, 10 us current pulse to a low inductance cylindrical load. Using a magnetically driven cylindrical liner, we have shocked a concentric tin cylindrical shell to melt-on-release and compared to theory and calculations. The inner surface of the tin cylinder has three sectors of single-mode perturbations, which are subject to Richtmyer-Meshkov Instability (RMI). Recent theoretical work on the EOS of tin has modified both the Hugoniot and the isentropes for release into various states in tabular data. The new multiphase EOS for tin, SESAME 2161, includes the beta and gamma solid phases as well as a liquid phase. It predicts a lower pressure boundary for release to pure solid (~20 GPa) and a higher pressure boundary for release to pure liquid (~35 GPa) than the existing SESAME 2160 table.
PHELIX Crenulation 2 and 3 Flash Report
This report documents the execution of the PHELIX driven Crenulation 2 and 3 at LANSCE proton radiography experiments in FY17 in support of the LANL Science Campaign-1 L2 Milestone (#5721). It should be noted that LANL Science Campaign 3 also supports the PHELIX at pRad efforts.
Physics Flash September 2019
Abstract not provided.
Physics Flash Spring 2020
Published by the Physical Sciences Directorate at LANL, the Spring 2020 issue of this newsletter contains an update from the division leader, Tanja Pietraß, Physics Division news roundaup, welcome to new hires, snapshots of Physics managers' work-from-home offices, and service celebrations.
Talbot-Lau X-Ray Deflectometry with Flash X-Ray Sources for Density Measurements in Dynamic Experiments
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